The initial results of an Environmental Protection Agency pilot study of polychlorinated biphenyls showed elevated amounts of the compound in three New York City public schools. EPA spokeswoman Mary Mears said that the preliminary findings were not an "immediate cause for alarm." A spokeswoman for the city's Education Department, Natalie Ravitz, said that the buildings are undergoing renovations to remove the source of the PCBs and should be open for the start of classes Sept. 8.

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